Just had to share this–inattention to detail?
Was doing a more thorough cleaning of my GF, taking a look at & cleaning the fans if needed, and noticed this odd thing laying in the back corner between the PCBA and the 4" exhaust fan. Not the brand of wipes I bought (Ziess).
And the amount of dust in the back, and none where the wipe was (the back side of it covered w/ dust too, of course) all suggest that it was left in there from the factory. (And besides I’ve never shown a flashlight in that back corner before).
So besides more attention needed by assemblers/final inspection to ensure the unit does not have any foreign bodies left in it, seems adding a dust cover over the PCBA would be a good thing for longevity of the components, reduce fire risk, and eliminate chance of damage to the components/connections from customers trying to clean back there…